## guard the feet of his faithful people ##

This refers to God guiding those who love him by using one part of the body, the feet, to refer to the whole person.  (See: [[rc://en/ta/man/translate/figs-synecdoche]])

## put to silence in darkness ##

This is another way of referring to death.  (See: [[rc://en/ta/man/translate/figs-euphemism]])